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Zhang D, Hu Y, Guo W, Song Y, Yang L, Yang S, Ou T, Liu Y, Zhang Y. Mendelian randomization study reveals a causal relationship between rheumatoid arthritis and risk for pre-eclampsia. Front Immunol 2022; 13:1080980. [PMID: 36578485 PMCID: PMC9790901 DOI: 10.3389/fimmu.2022.1080980] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Accepted: 11/28/2022] [Indexed: 12/14/2022] Open
Abstract
Background Epidemiological observational studies have investigated the relationship between rheumatoid arthritis(RA) and pre-eclampsia, but no consistent conclusions were obtained due to various limitations. Hence, we conducted a two-sample mendelian randomization analysis to evaluate the potential causal effect of RA on pre-eclampsia. Methods Summary-level statistics for RA were derived from a large-scale meta-analysis of datasets of genome-wide association studies(GWAS) which involved 14,361 cases and 43,923 controls. Moreover, summary statistics for pre-eclampsia or eclampsia were sourced from the Finn biobank which contained 3,903 cases and 114,735 controls. The inverse variance weighting (IVW) as well as other four effective methods including MR-Egger, weighted median, weighted mode, and simple mode were applied to deduce the potential causal relationships between RA and pre-eclampsia comprehensively. Results The two-sample MR analysis suggested a strong causal relationship between RA and pre-eclampsia[OR,1.05;95%CI, 1.01-1.09;p<0.05]. The OR estimates obtained from the weighted mode[OR,1.09;95%CI,1.03-1.15;p<0.01] and weighted median[OR,1.07;95%CI, 1.01-1.14;p<0.05] were similar to those from the IVW method, but there was no significant association observed in MR Egger and simple mode analysis. Conclusion This MR analysis provides evidence of a positive causal association between RA and pre-eclampsia genetically. Our findings highlight the importance of more intensive prenatal care and early intervention among pregnant women with RA to prevent potential adverse obstetric outcomes. Moreover, our study provides clues for risk factor identification and early prediction of pre-eclampsia.
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Affiliation(s)
- Dingyi Zhang
- Department of Obstetrics and Gynecology, Key Laboratory of Birth Defects and Related of Women and Children of Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, China,West China School of Medicine, Sichuan University, Chengdu, China
| | - Ying Hu
- Department of Obstetrics and Gynecology, Key Laboratory of Birth Defects and Related of Women and Children of Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, China,Reproductive Endocrinology and Regulation Laboratory, West China Second University Hospital, Sichuan University, Chengdu, China
| | - Weijie Guo
- Department of Obstetrics and Gynecology, Key Laboratory of Birth Defects and Related of Women and Children of Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Yang Song
- Department of Pharmacy Services Tacoma, St. Joseph Medical Center, Catholic Health Initiative (CHI) Franciscan Health System, Tacoma, WA, United States
| | - Lin Yang
- Department of Pharmacy, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Shuhan Yang
- Department of Obstetrics and Gynecology, Key Laboratory of Birth Defects and Related of Women and Children of Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, China,West China School of Medicine, Sichuan University, Chengdu, China
| | - Taoaixin Ou
- Department of Obstetrics and Gynecology, Key Laboratory of Birth Defects and Related of Women and Children of Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, China,West China School of Medicine, Sichuan University, Chengdu, China
| | - Yanxu Liu
- Department of Obstetrics and Gynecology, Key Laboratory of Birth Defects and Related of Women and Children of Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, China,West China School of Medicine, Sichuan University, Chengdu, China
| | - Yaoyao Zhang
- Department of Obstetrics and Gynecology, Key Laboratory of Birth Defects and Related of Women and Children of Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, China,*Correspondence: Yaoyao Zhang,
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2
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Kulmann-Leal B, Ellwanger JH, Chies JAB. CCR5Δ32 in Brazil: Impacts of a European Genetic Variant on a Highly Admixed Population. Front Immunol 2021; 12:758358. [PMID: 34956188 PMCID: PMC8703165 DOI: 10.3389/fimmu.2021.758358] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Accepted: 11/23/2021] [Indexed: 01/10/2023] Open
Abstract
The genetic background of Brazilians encompasses Amerindian, African, and European components as a result of the colonization of an already Amerindian inhabited region by Europeans, associated to a massive influx of Africans. Other migratory flows introduced into the Brazilian population genetic components from Asia and the Middle East. Currently, Brazil has a highly admixed population and, therefore, the study of genetic factors in the context of health or disease in Brazil is a challenging and remarkably interesting subject. This phenomenon is exemplified by the genetic variant CCR5Δ32, a 32 base-pair deletion in the CCR5 gene. CCR5Δ32 originated in Europe, but the time of origin as well as the selective pressures that allowed the maintenance of this variant and the establishment of its current frequencies in the different human populations is still a field of debates. Due to its origin, the CCR5Δ32 allele frequency is high in European-derived populations (~10%) and low in Asian and African native human populations. In Brazil, the CCR5Δ32 allele frequency is intermediate (4-6%) and varies on the Brazilian States, depending on the migratory history of each region. CCR5 is a protein that regulates the activity of several immune cells, also acting as the main HIV-1 co-receptor. The CCR5 expression is influenced by CCR5Δ32 genotypes. No CCR5 expression is observed in CCR5Δ32 homozygous individuals. Thus, the CCR5Δ32 has particular effects on different diseases. At the population level, the effect that CCR5Δ32 has on European populations may be different than that observed in highly admixed populations. Besides less evident due to its low frequency in admixed groups, the effect of the CCR5Δ32 variant may be affected by other genetic traits. Understanding the effects of CCR5Δ32 on Brazilians is essential to predict the potential use of pharmacological CCR5 modulators in Brazil. Therefore, this study reviews the impacts of the CCR5Δ32 on the Brazilian population, considering infectious diseases, inflammatory conditions, and cancer. Finally, this article provides a general discussion concerning the impacts of a European-derived variant, the CCR5Δ32, on a highly admixed population.
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Affiliation(s)
| | | | - José Artur Bogo Chies
- Laboratório de Imunobiologia e Imunogenética, Programa de Pós-Graduação em Genética e Biologia Molecular (PPGBM), Departamento de Genética, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
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3
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Karakaya B, van Moorsel CHM, Veltkamp M, Roodenburg-Benschop C, Kazemier KM, van der Helm-van Mil AHM, Huizinga TWJ, Grutters JC, Rijkers GT. A Polymorphism in C-C Chemokine Receptor 5 (CCR5) Associates with Löfgren's Syndrome and Alters Receptor Expression as well as Functional Response. Cells 2021; 10:1967. [PMID: 34440736 PMCID: PMC8394428 DOI: 10.3390/cells10081967] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 07/27/2021] [Accepted: 07/29/2021] [Indexed: 11/23/2022] Open
Abstract
C-C chemokine receptor 5 (CCR5) and polymorphisms in CCR5 gene are associated with sarcoidosis and Löfgren's syndrome. Löfgren's syndrome is an acute and usually self-remitting phenotype of sarcoidosis. We investigated whether the single nucleotide polymorphism (SNP) rs1799987 is associated with susceptibility for Löfgren's syndrome and has an effect on CCR5 expression on monocytes and function of CCR5. A total of 106 patients with Löfgren's syndrome and 257 controls were genotyped for rs1799987. Expression of CCR5 on monocytes was measured by flowcytometry. We evaluated calcium influx kinetics following stimulation upon N-formylmethionyl-leucyl-phenylalanine (fMLP) and macrophage inflammatory protein-1α (MIP-1α) on monocytes by measuring the median fluorescence intensity (MFI). The frequency of the G allele of rs1799987 was significantly higher in Löfgren's syndrome than in healthy controls (p = 0.0015, confidence interval (CI) 1.22-2.32, odds ratio (OR) 1.680). Patients with a GG genotype showed higher CCR5 expression on monocytes than patients with the AA genotype (p = 0.026). A significantly (p = 0.027) lower count of patients with the GG genotype showed a calcium influx reaction to simulation upon MIP-1 α, compared with patients with the AA genotype. The rs1799987 G allele in CCR5 gene is associated with susceptibility to Löfgren's syndrome and with quantitative and qualitative changes in CCR5, potentially effecting the inflammatory response.
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Affiliation(s)
- Bekir Karakaya
- Interstitial Lung Diseases Centre of Excellence, St. Antonius Hospital, P.O. Box 2500, 3430 EM Nieuwegein, The Netherlands; (C.H.M.v.M.); (M.V.); (C.R.-B.); (J.C.G.)
| | - Coline H. M. van Moorsel
- Interstitial Lung Diseases Centre of Excellence, St. Antonius Hospital, P.O. Box 2500, 3430 EM Nieuwegein, The Netherlands; (C.H.M.v.M.); (M.V.); (C.R.-B.); (J.C.G.)
- Division of Heart & Lungs, University Medical Center Utrecht, P.O. Box 85500, 3508 GA Utrecht, The Netherlands;
| | - Marcel Veltkamp
- Interstitial Lung Diseases Centre of Excellence, St. Antonius Hospital, P.O. Box 2500, 3430 EM Nieuwegein, The Netherlands; (C.H.M.v.M.); (M.V.); (C.R.-B.); (J.C.G.)
- Division of Heart & Lungs, University Medical Center Utrecht, P.O. Box 85500, 3508 GA Utrecht, The Netherlands;
| | - Claudia Roodenburg-Benschop
- Interstitial Lung Diseases Centre of Excellence, St. Antonius Hospital, P.O. Box 2500, 3430 EM Nieuwegein, The Netherlands; (C.H.M.v.M.); (M.V.); (C.R.-B.); (J.C.G.)
| | - Karin M. Kazemier
- Division of Heart & Lungs, University Medical Center Utrecht, P.O. Box 85500, 3508 GA Utrecht, The Netherlands;
- Center for Translational Immunology, University Medical Center Utrecht, P.O. Box 85500, 3508 GA Utrecht, The Netherlands
| | - Annette H. M. van der Helm-van Mil
- Department of Rheumatology, Leiden University Medical Center, P.O. Box 9600, 2300 RC Leiden, The Netherlands; (A.H.M.v.d.H.-v.M.); (T.W.J.H.)
| | - Tom W. J. Huizinga
- Department of Rheumatology, Leiden University Medical Center, P.O. Box 9600, 2300 RC Leiden, The Netherlands; (A.H.M.v.d.H.-v.M.); (T.W.J.H.)
| | - Jan C. Grutters
- Interstitial Lung Diseases Centre of Excellence, St. Antonius Hospital, P.O. Box 2500, 3430 EM Nieuwegein, The Netherlands; (C.H.M.v.M.); (M.V.); (C.R.-B.); (J.C.G.)
- Division of Heart & Lungs, University Medical Center Utrecht, P.O. Box 85500, 3508 GA Utrecht, The Netherlands;
| | - Ger T. Rijkers
- Department of Science, University College Roosevelt, P.O. Box 94, 4330 AB Middelburg, The Netherlands;
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Martín‐Leal A, Blanco R, Casas J, Sáez ME, Rodríguez‐Bovolenta E, de Rojas I, Drechsler C, Real LM, Fabrias G, Ruíz A, Castro M, Schamel WWA, Alarcón B, van Santen HM, Mañes S. CCR5 deficiency impairs CD4 + T-cell memory responses and antigenic sensitivity through increased ceramide synthesis. EMBO J 2020; 39:e104749. [PMID: 32525588 PMCID: PMC7396835 DOI: 10.15252/embj.2020104749] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Revised: 05/12/2020] [Accepted: 05/14/2020] [Indexed: 12/24/2022] Open
Abstract
CCR5 is not only a coreceptor for HIV-1 infection in CD4+ T cells, but also contributes to their functional fitness. Here, we show that by limiting transcription of specific ceramide synthases, CCR5 signaling reduces ceramide levels and thereby increases T-cell antigen receptor (TCR) nanoclustering in antigen-experienced mouse and human CD4+ T cells. This activity is CCR5-specific and independent of CCR5 co-stimulatory activity. CCR5-deficient mice showed reduced production of high-affinity class-switched antibodies, but only after antigen rechallenge, which implies an impaired memory CD4+ T-cell response. This study identifies a CCR5 function in the generation of CD4+ T-cell memory responses and establishes an antigen-independent mechanism that regulates TCR nanoclustering by altering specific lipid species.
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Affiliation(s)
- Ana Martín‐Leal
- Department of Immunology and OncologyCentro Nacional de Biotecnología (CNB/CSIC)MadridSpain
| | - Raquel Blanco
- Department of Immunology and OncologyCentro Nacional de Biotecnología (CNB/CSIC)MadridSpain
| | - Josefina Casas
- Department of Biological ChemistryInstitute of Advanced Chemistry of Catalonia (IQAC‐CSIC)BarcelonaSpain
- CIBER Liver and Digestive Diseases (CIBER‐EDH)Instituto de Salud Carlos IIIMadridSpain
| | - María E Sáez
- Centro Andaluz de Estudios Bioinformáticos (CAEBi)SevilleSpain
| | - Elena Rodríguez‐Bovolenta
- Department of Cell Biology and ImmunologyCentro de Biología Molecular Severo Ochoa (CBMSO/CSIC)MadridSpain
| | - Itziar de Rojas
- Alzheimer Research CenterMemory Clinic of the Fundació ACEInstitut Català de Neurociències AplicadesBarcelonaSpain
| | - Carina Drechsler
- Signaling Research Centers BIOSS and CIBSSUniversity of FreiburgFreiburgGermany
- Department of ImmunologyFaculty of BiologyUniversity of FreiburgFreiburgGermany
- Institute for Pharmaceutical SciencesUniversity of FreiburgFreiburgGermany
| | - Luis Miguel Real
- Unit of Infectious Diseases and MicrobiologyHospital Universitario de ValmeSevilleSpain
- Department of Biochemistry, Molecular Biology and ImmunologySchool of MedicineUniversidad de MálagaMálagaSpain
| | - Gemma Fabrias
- Department of Biological ChemistryInstitute of Advanced Chemistry of Catalonia (IQAC‐CSIC)BarcelonaSpain
- CIBER Liver and Digestive Diseases (CIBER‐EDH)Instituto de Salud Carlos IIIMadridSpain
| | - Agustín Ruíz
- Alzheimer Research CenterMemory Clinic of the Fundació ACEInstitut Català de Neurociències AplicadesBarcelonaSpain
- CIBER Enfermedades Neurodegenerativas (CIBERNED)Instituto de Salud Carlos IIIMadridSpain
| | - Mario Castro
- Interdisciplinary Group of Complex SystemsEscuela Técnica Superior de IngenieríaUniversidad Pontificia ComillasMadridSpain
| | - Wolfgang WA Schamel
- Signaling Research Centers BIOSS and CIBSSUniversity of FreiburgFreiburgGermany
- Department of ImmunologyFaculty of BiologyUniversity of FreiburgFreiburgGermany
- Centre for Chronic Immunodeficiency (CCI)University of FreiburgFreiburgGermany
| | - Balbino Alarcón
- Department of Cell Biology and ImmunologyCentro de Biología Molecular Severo Ochoa (CBMSO/CSIC)MadridSpain
| | - Hisse M van Santen
- Department of Cell Biology and ImmunologyCentro de Biología Molecular Severo Ochoa (CBMSO/CSIC)MadridSpain
| | - Santos Mañes
- Department of Immunology and OncologyCentro Nacional de Biotecnología (CNB/CSIC)MadridSpain
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5
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Toson B, Dos Santos EJ, Adelino JE, Sandrin-Garcia P, Crovella S, Louzada-Júnior P, Oliveira RDR, Pedroza LSRA, de Fátima Lobato Cunha Sauma M, de Lima CPS, Barbosa FB, Brenol CV, Xavier RM, Chies JAB, Veit TD. CCR5Δ32 and the genetic susceptibility to rheumatoid arthritis in admixed populations: a multicentre study. Rheumatology (Oxford) 2018; 56:495-497. [PMID: 28082621 DOI: 10.1093/rheumatology/kew398] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2016] [Indexed: 11/14/2022] Open
Affiliation(s)
- Bruno Toson
- Laboratório de Imunogenética, Universidade Federal do Rio Grande do Sul, Porto Alegre
| | - Eduardo José Dos Santos
- Laboratório de Genética Humana e Médica, Universidade Federal do Pará, Belém.,Serviço de Reumatologia, Centro Universitário do Estado do Pará- CESUPA, Belém
| | | | | | - Sergio Crovella
- Departamento de Genética, Universidade Federal de Pernambuco, Recife
| | - Paulo Louzada-Júnior
- Serviço de Clínica Médica, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto
| | | | | | | | | | | | | | | | - José Artur Bogo Chies
- Laboratório de Imunogenética, Universidade Federal do Rio Grande do Sul, Porto Alegre
| | - Tiago Degani Veit
- Laboratório de Imunogenética, Universidade Federal do Rio Grande do Sul, Porto Alegre.,Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
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Zhou TB, Jiang ZP, Zhou JF, Su N. Relationship between chemokine receptor 5 Δ32/W gene polymorphism and lupus nephritis. Hum Immunol 2014; 75:968-72. [PMID: 25167769 DOI: 10.1016/j.humimm.2014.08.201] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2014] [Revised: 08/18/2014] [Accepted: 08/18/2014] [Indexed: 11/17/2022]
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Haudenschild DR, Yik JHN. Reply: To PMID 24470357. Arthritis Rheumatol 2014; 66:3526. [PMID: 25154864 DOI: 10.1002/art.38817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Song GG, Kim JH, Lee YH. The chemokine receptor 5 delta32 polymorphism and type 1 diabetes, Behcet's disease, and asthma: a meta-analysis. Immunol Invest 2013; 43:123-36. [PMID: 24171669 DOI: 10.3109/08820139.2013.847457] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE The aim of this study was to determine whether the functional chemokine receptor 5 delta32 (CCR5-Δ32) polymorphism is associated with susceptibility to type 1 diabetes (T1D), Behcet's disease (BD), and asthma. RESULTS Fourteen studies encompassing 9,656 cases and 12,431 controls, including 6 on T1D, 5 on BD, and 3 on asthma, were available for meta-analysis. The meta-analysis showed a significant negative association between T1D and the CCR5-Δ32 allele (odds ratio [OR] = 0.854, 95% confidence interval [CI] = 0.800-0.912, p = 2.2 × 10⁻⁷). Stratification by ethnicity and analysis of the Δ32Δ32 + Δ32W genotype indicated a significant negative association between the CCR5-Δ32 allele and T1D in Europeans (OR = 0.857, 95% CI = 0.802-0.915, p = 3.5 × 10⁻⁸; OR = 0.896, 95% CI = 0.808-0.932, p = 9.3 × 10⁻⁶, respectively). The meta-analysis showed a positive association between BD and the Δ32Δ32 + Δ32W genotype (OR = 1.403, 95% CI = 1.008-1.954, p = 0.045). Stratification by HLA-B51 status indicated an association between the CCR5-Δ32 allele and HLA-B51-positive BD, but not HLA-B51-negative BD (OR = 1.619, 95% CI = 1.070-2.451, p = 0.023; OR = 1.036, 95% CI = 0.674-1.593, p = 0.872, respectively). No association was found between the CCR5-Δ32 polymorphism and asthma. CONCLUSIONS This meta-analysis demonstrates that the CCR5-Δ32 polymorphism acts as a protective factor in T1D development in Europeans, and a risk factor for BD among HLA-B51 carriers. However, no association was found between the CCR5-Δ32 polymorphism and asthma.
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Affiliation(s)
- Gwan Gyu Song
- Division of Rheumatology, Department of Internal Medicine, Korea University College of Medicine , Seoul , Korea
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Comerford I, Kara EE, McKenzie DR, McColl SR. Advances in understanding the pathogenesis of autoimmune disorders: focus on chemokines and lymphocyte trafficking. Br J Haematol 2013; 164:329-41. [PMID: 24164387 DOI: 10.1111/bjh.12616] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Lymphocyte trafficking is a key step in the pathogenesis of various autoimmune diseases. Recruitment of autoreactive lymphocytes to inflamed tissues is a defining feature of numerous persistent organ-specific autoimmune conditions and various therapies are now used in several of these diseases which appear to specifically block lymphocyte migration. Thus, better understanding of the molecular events involved in homing of autoreactive pathogenic lymphocytes may present novel opportunities for pharmacological intervention in autoimmune diseases, such as multiple sclerosis, rheumatoid arthritis, type-1 diabetes and psoriasis. This review describes recent progress in understanding lymphocyte trafficking in autoimmunity, focusing on the involvement of the chemokine and chemokine receptor superfamily. Possible strategies to improve therapeutics for autoimmune diseases arising from these studies are discussed.
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Affiliation(s)
- Iain Comerford
- Chemokine Biology Laboratory, School of Molecular and Biomedical Science, Centre for Molecular Pathology, The University of Adelaide, Adelaide, SA, Australia
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Cobb JE, Hinks A, Thomson W. The genetics of juvenile idiopathic arthritis: current understanding and future prospects. Rheumatology (Oxford) 2013; 53:592-9. [DOI: 10.1093/rheumatology/ket314] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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11
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Schauren JS, Marasca JA, Veit TD, Monticielo OA, Xavier RM, Brenol JCT, Chies JAB. CCR5delta32 in systemic lupus erythematosus: implications for disease susceptibility and outcome in a Brazilian population. Lupus 2013; 22:802-9. [PMID: 23753295 DOI: 10.1177/0961203313491848] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The aim of this study was to analyze the allelic and genotypic frequencies of the CCR5delta32 polymorphism in systemic lupus erythematosus (SLE) patients and to investigate a possible association of this allele with SLE susceptibility and clinical outcome. A total of 367 SLE patients and 435 healthy controls were genotyped for the CCR5delta32 polymorphism. We observed that, in European-derived individuals, the frequency of the CCR5delta32 allele was smaller in patients than in controls (2.7% vs. 7.5%, OR 0.34, 95% CI 0.17-0.65, p Bonf=0.002), suggesting that this allele could be considered a protective factor for the disease. Regarding clinical manifestations, we observed that CCR5delta32 female African-derived carrier patients presented a higher predisposition to class IV nephritis when compared with absent nephritis/other class group (13.8% vs. 3.8%, OR 37.1, 95% CI 2.8-1854.7, p Bonf=0.030). A multivariate analysis including all female patients and controlling for the presence or absence of anti-dsDNA antibodies, ethnicity and age at diagnosis showed an increased relative risk of 3.9 times for patients carrying the CCR5delta32 allele to develop class IV nephritis as compared with noncarriers. Our data suggest that the CCR5delta32 allele is a protective factor for the disease in European-derived patients and a susceptibility factor to class IV nephritis in African-derived female patients.
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Affiliation(s)
- J S Schauren
- Immunogenetics Laboratory, Genetics Department, Biosciences Institute, Universidade Federal do Rio Grande do Sul, Brazil
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